#include <stdio.h>

#define TRUE 1
#define FALSE 0
#define SQ(x)(x)*(x)

void main()
{
    int num;
    int again = 1;
    printf("\40:Program will stop if input value less than 50.\n");
    while(again)
    {
        printf("\40lease input number ==>");
        scanf("%d",&num);
        printf("\40:The square for this number is %d\n",SQ(num));
        if(num >= 50)
        again = TRUE;
        else
        again = FALSE;
    }
}